What is the gravitational potential energy of a 1.3 kg book that is 473

A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates (1.40

leva [86]

Answer:

The work done required on the coin during the displacement is 21.75 w.

Explanation:

Given that,

A coin slides over a friction-less plane i.e friction force = 0.

The co-ordinate of the given point is (1.40 m, 7.20 m).

The position vector of the given point is represented by $1.40 \hat i+7.20 \hat j$ .

The displacement of the coin is

$\vec d=1.40 \hat i+7.20 \hat j$

The force has magnitude 4.50 N and its makes an angle 128° with positive x axis.

Then x component of the force = 4.50 cos128°

The y component of the force = 4.50 sin128°

Then the position vector of the force is

$\vec F=(4.50 cos 128^\circ)\hat i+(4.50 sin 128^\circ)\hat j$

$=-2.77 \hat i+3.56 \hat j$

We know that,

work done is a scalar product of force and displacement.

$W=\vec F.\vec d$

$=(-2.77 \hat i+3.56 \hat j).(1.40 \hat i+7.20 \hat j)$

=(-2.77×1.40+ 3.56×7.20) w

=21.75 w

The work done required on the coin during the displacement is 21.75 w.

6 0

3 years ago

A car is moving at a speed of 50 km/hour. The driver takes her foot off of the accelerator and the car coasts to a stop. Why

harina [27]

Removing the foot from the accelerator means that no ac

8 0

3 years ago

Read 2 more answers

Name THREE things that impact a collision.

Lapatulllka [165]

Answer:

The three types of impact that occur are those involving the vehicle, the body of the vehicle occupant, and the organs within the body of the occupant.

4 0

3 years ago

6. In an integrated circuit, each wafer is cut into sections, which

Katen [24]

Answer:

B. carry a single circuit and are placed in individual cases.

Explanation:

An electric circuit can be defined as an interconnection of electrical components which creates a path for the flow of electric charge (electrons) due to a driving voltage.

Generally, an electric circuit consists of electrical components such as resistors, capacitors, battery, transistors, switches, inductors, etc.

Similarly, an integrated circuit (IC) also referred to as microchip can be defined as a semiconductor-based electronic component that comprises of many other tiny electronic components such as capacitors, resistors, transistors, and inductors.

Integrated circuits (ICs) are often used in virtually all modern electronic devices to carry out specific tasks or functions such as amplification, timer, oscillation, computer memory, microprocessor, etc.

A wafer can be defined as a thin slice of crystalline semiconductor such as silicon and germanium used typically for the construction of an integrated circuit.

In an integrated circuit, each wafer is cut into sections, which generally comprises of a single circuit that are placed in individual cases.

Additionally, a semiconductor can be defined as a crystalline solid substance that has its conductivity lying between that of a metal and an insulator, due to the effects of temperature or an addition of an impurity.

7 0

3 years ago

What are the first three harmonics of a note produced on a 32.0 cm long violin string if waves on this string have a speed of 28

vodka [1.7K]

Answer:

The first harmonics are the fundamental, the first overtone, and the second overtone,

For a string fixed at both ends you have:

N-A-N F/2

N-A-N-A-N F

N-A-N-A-N-A-N 3 F/2 each harmonic increases by F/2

Where N are the anti-nodes and A the antinodes

N-A-N-A-N represents 1 wavelength for string fixed at both ends

So 1 wavelength is 64 cm

280 m/s = F * .64 m and F = 437.5 Hz (second harmonic)

First harmonic = F/2 = 218.75 / sec

Third harmonic = 3 F / 2 = 656.25 /sec

6 0

3 years ago